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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 1331 | else if ( 'term_group' == $_orderby ) |
| 1332 | $orderby = 't.term_group'; |
| 1333 | else if ( 'none' == $_orderby ) |
| 1334 | $orderby = ''; |
| 1335 | elseif ( empty($_orderby) || 'id' == $_orderby ) |
| 1336 | $orderby = 't.term_id'; |
| 1337 | else |
| 1338 | $orderby = 't.name'; |
| 1339 | |
| 1340 | $orderby = apply_filters( 'get_terms_orderby', $orderby, $args, $taxonomies ); |
| 1341 | |
| 1342 | if ( !empty($orderby) ) |
| 1343 | $orderby = "ORDER BY $orderby"; |
| 1344 | else |
| 1345 | $order = ''; |
| 1346 | |
| 1347 | $order = strtoupper( $order ); |
| 1348 | if ( '' !== $order && !in_array( $order, array( 'ASC', 'DESC' ) ) ) |
| 1349 | $order = 'ASC'; |